Evaluation is an applied inquiry process for collecting and synthesizing evidence that culminates in conclusion about the state of affairs,value,merit,worth, significance or quality of program,product,person,policy or plan.Coclusions made in evaluations encompass both an empirical aspect (that something is the case) and a normative aspect (judgement about the value of something).It is the value feature that distinguishes evaluation from other type of inquiry, such as basic science research,clinical epidemiology or publci polling